Telecom XT customers needing to contact emergency services are being told to use landlines instead of their cellphones while the network remains down.

Customers south of Taupo still cannot make or receive calls and text messages, or access mobile broadband.

In a statement a Telecom spokeswoman said "until service is restored, Telecom recommends that any XT customer experiencing issues attempting to contact emergency services on their mobile, should immediately use a landline instead".